Supernova remnant
Supernova remnant is an expanding structure of gas and dust produced by a supernova explosion. It consists of ejected stellar material interacting with the surrounding interstellar medium.
Supernova remnants are discussed in astrophysics, high-energy astronomy, and studies of stellar evolution.
Status
Supernova remnants are observed across the electromagnetic spectrum, including radio, optical, X-ray, and gamma-ray wavelengths. Models of their expansion, shock dynamics, and role in cosmic-ray acceleration continue to be developed.